题目

听下面一段独白，回答以下小题 （1） Why was there a dirty mark on the plastic bowl? A . To make it stand out among the exhibits. B . To give the impression of discolouration. C . To make it look like the original piece. D . To showcase the artistic style of the artist. （2） What happened to the artwork at the Tate Gallery of British Art in 2004? A . It was sold for a record one million pounds. B . It was restored to its original state. C . It was partially damaged by accident. D . It was thrown away on purpose. （3） What does the speaker m 当细胞处于饥饿状态时，可降解自身的生物大分子，以产生营养成分供细胞急需。请推测，在此过程中起积极作用的细胞器可能是                        （     ） A．线粒体         B．高尔基体       C．溶酶体       D．核糖体